[Bug 321528] Re: Include ext4 defragmenting tool

[A.Kromic]

Oh, and concerning ext4 fragmentation, I find it strange that so much
fragmentation as cited above... The most fragmented ext4 FS I have is
about 8%, and strangely, another one which is almost full and its
content moderately often changed, stays low at about 2% even though I've
expected much more.

I believe such a low degree of fragmentation I have is due to Extents,
and I have specifically enabled them for my ext4 filesystems. Perhaps in
those cases with higher ext4 fragmentation extents are turned off? I'm
not sure are they enabled by default, but I believe they are disabled if
the FS is upgraded from ext3, so I'd suggest anyone to manually enable
it (in fstab, perhaps also with tune2fs); I'd recommend rebooting to
single mode immediately after that, and then manually fsck all
filesystems for which extents were turned on. And remember, backup often
;)

Also, when extents are turned on, perhaps running the Defrag script or
Shake would help lower the fragmentation...

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https://bugs.launchpad.net/bugs/321528

Title:
  Include ext4 defragmenting tool

Status in “e2fsprogs” package in Ubuntu:
  Fix Released
Status in Baltix GNU/Linux:
  New

Bug description:
  Please include the ext4 defrag and other tools in Juanty.  Currently
  using alpha 3 with all patches as of 2009-01-026 and do not see it in
  the package list on any "...vese"

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